Claude Sonnet 5.5
Rank of 2703new this week
Known for
Everyday coding, bug fixes and polished documents, where speed and price matter.
The second model in Anthropic's 5.5 family, out on 28 September 2026. It keeps Sonnet 5's price, runs over 30% faster, and scores 70.6% on Terminal-Bench 4.0, the highest on this board.
What it does7
- $2 / $10 per million tokens, same as Sonnet 5
- Cache reads at $0.20 per million
- Over 30% faster output than Sonnet 5
- Adaptive thinking with effort control, up to max
- Text and image in, text out
- First Sonnet with cyber safeguards
- On AWS, Google Cloud and Microsoft Azure
From Claude Sonnet 5.5’s own site. Not used for ranking.
78index score · LLMs
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